<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Hello Canvas</title>
</head>
<body>
  <canvas id="myCanvas"></canvas>
  <script type="text/javascript">
    var canvas = document.getElementById('myCanvas');
    var ctx = canvas.getContext('2d');
    ctx.fillStyle='#4DC7D0';
    ctx.fillRect(10, 10, 800, 900);
  </script>
</body>
</html>
